About 120 students showed up at Woodland Hills High School in with their shirts untucked on Thursday. School officials say about 85 students were sent home for refusing to comply with the new policy; the other students tucked in their shirts and remained in school.
Principal Dan Stephens says the dress code was instituted as a safety measure to ensure students are not hiding anything under their shirts.
District officials say students were made aware of the new rule through assemblies and signs on the walls of the schools. The school has about 1,700 students.